7. Which statement is NOT true?
If x2 = 1, then x = 1.
x2 = 1 if and only if x = 1 or x = -1.
If x = -1, then x2 = 1
If x = 1, then x2 = 1..

A or 1st option

Step-by-step explanation:

The reason is the 2nd option.

if x^2 =1 , x can be 1 or -1

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

step-by-step explanation: